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Nicene Creed

Pope Leo XIV and Ecumenical Patriarch Bartholomew I of Constantinople at an ecumenical event marking the 1,700th anniversary of Nicene Creed, in Iznik, Turkey, on November 28th, 2025. / Screenshot: Vatican Media

Pope Leo XIV Marks Nicaea Anniversary, Urges Christians to Overcome Divisions

Nov 28, 2025

Pope Leo XIV commemorated the 1700th anniversary of the First Council of Nicaea on Thursday in the Turkish city historically known as the birthplace of the Nicene Creed, calling Christians to overcome “the scandal of divisions” and to renew their commitment to unity.

The Council of Nicaea in 325 as depicted in a fresco in Salone Sistino at the Vatican. / Credit: Giovanni Guerra (1544-1618), Cesare Nebbia (1534-1614) e aiuti, Public domain, via Wikimedia Commons

Council of Nicaea: 1,700 Years of Christian Unity amid Division

Nov 28, 2025

The first ecumenical council, known as the Council of Nicaea, is still accepted as authoritative by the Catholic Church, the Eastern Orthodox Church, and many Protestants.

Pope Leo XIV receives Patriarch Bartholomew of Constantinople at the Vatican on May 30, 2025. / Vatican Media

Pope Leo XIV Urges Christians to Move Beyond Outdated Theological Disputes

Nov 23, 2025

Pope Leo XIV has called on Christians to move beyond “theological controversies” that no longer serve the cause of unity and to rediscover together the faith professed at the Council of Nicaea 1,700 years ago.

Pope Leo XIV greets participants of the symposium “Nicaea and the Church of the Third Millennium: Towards Catholic-Orthodox Unity" in Rome, Saturday, June 7, 2025 / Credit: Vatican Media

At Ecumenical Symposium, Pope Leo XIV Says Catholic Church Open to Universal Easter Date

Jun 7, 2025

The pope spoke at the symposium “Nicaea and the Church of the Third Millennium: Towards Catholic-Orthodox Unity,” which took place this week at the Pontifical University of Saint Thomas Aquinas in Rome.

The Council of Nicaea in 325 as depicted in a fresco in Salone Sistino at the Vatican. / Credit: Giovanni Guerra (1544-1618), Cesare Nebbia (1534-1614) e aiuti, Public domain, via Wikimedia Commons

Vatican Releases Document to mark 1,700th Anniversary of First Council of Nicaea

Apr 3, 2025

The International Theological Commission has published “Jesus Christ, Son of God, Savior: The 1,700th Anniversary of the Ecumenical Council of Nicaea.”

“If the devil divides, the creed unites!” the pope said in his Feb. 6, 2025, remarks to a visiting group of priests and monks of the Oriental Orthodox churches, including Armenian, Coptic, Ethiopian, Eritrean, Malankar, and Syriac. / Credit: Vatican Media

Pope Francis Reiterates Desire for "full unity" among Christians

Feb 6, 2025

“The proclamation of the common faith requires, first of all, that we love one another,” the Holy Father said in a Feb. 6 audience with Oriental Orthodox priests and monks.

Pope Francis meets with ecumenical delegation from Finland on Jan. 17, 2022. Vatican Media

Pope Francis Looks Ahead to the 1700th Anniversary of the Council of Nicaea in 2025

Jan 17, 2022

Pope Francis highlighted the upcoming anniversaries of two major events in Church history as moments that can help Christians seek unity.